package com.example.demo.controller;
import com.alipay.api.AlipayApiException;
import com.alipay.api.internal.util.AlipaySignature;
import com.example.demo.config.AlipayConfig;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.example.demo.pojo.Recharge;
import com.example.demo.pojo.Result;
import com.example.demo.service.RechargeService;
import com.example.demo.service.UserService;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.codehaus.jettison.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.Map;


@RestController
@RequestMapping("/alipay")
public class AlipayController {

    private static final String GATEWAY_URL = "https://openapi-sandbox.dl.alipaydev.com/gateway.do";
    private final String FORMAT = "JSON";
    private final String CHARSET = "UTF-8";
    private final String SIGN_TYPE = "RSA2";

    @Resource
    private RechargeService rechargeService;
    @Resource
    private AlipayConfig aliPayConfig;
    @Autowired
    private UserService userService;


    @GetMapping("/pay")
    public void pay(int recordid, HttpServletResponse httpResponse) throws Exception {
        // 查询订单信息
        Recharge recharge = rechargeService.getByrecordid(recordid);
        if (recharge == null) {
            // 如果订单不存在，应该返回错误信息
            httpResponse.sendError(HttpServletResponse.SC_BAD_REQUEST, "订单不存在");
            return;
        }
        // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
        AlipayClient alipayClient = new DefaultAlipayClient(
                GATEWAY_URL,
                aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivatekey(),
                FORMAT,
                CHARSET,
                aliPayConfig.getAlipayPublicKey(),
                SIGN_TYPE
        );

        // 2. 创建 Request并设置Request参数
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest(); // 发送请求的 Request类
        request.setNotifyUrl(aliPayConfig.getNotifyUrl());
        JSONObject bizContent = new JSONObject();
        bizContent.put("out_trade_no", recharge.getPayid()); // 我们自己生成的订单编号
        bizContent.put("total_amount", recharge.getAmount()); // 订单的总金额
        bizContent.put("subject", "充值");
        bizContent.put("product_code", "FAST_INSTANT_TRADE_PAY");
        request.setBizContent(bizContent.toString());

        // 执行请求，拿到响应的结果，返回给浏览器
        String form = "";
        try {
            form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
            httpResponse.setContentType("text/html;charset=" + CHARSET);
            httpResponse.getWriter().write(form); // 直接将完整的表单html输出到页面
            httpResponse.getWriter().flush();
            httpResponse.getWriter().close();
        } catch (AlipayApiException e) {
            e.printStackTrace();
            // 这里应该处理异常，比如记录日志，返回错误信息等
            httpResponse.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "支付请求失败");
        }
    }


    @PostMapping("/notify")  // 注意这里必须是POST接口
    public String payNotify(HttpServletRequest request) throws Exception {
        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {
            System.out.println("=========支付宝异步回调========");

            Map<String, String> params = new HashMap<>();
            Map<String, String[]> requestParams = request.getParameterMap();
            for (String name : requestParams.keySet()) {
                params.put(name, request.getParameter(name));
                // System.out.println(name + " = " + request.getParameter(name));
            }

            String tradeNo = params.get("out_trade_no");
            String gmtPayment = params.get("gmt_payment");
            String alipayTradeNo = params.get("trade_no");
            String sign = params.get("sign");
            String content = AlipaySignature.getSignCheckContentV1(params);
            boolean checksignature = AlipaySignature.rsa256CheckContent(content, sign, aliPayConfig.getAlipayPublicKey(), "UTF-8");
            // 支付宝验签
            if (checksignature) {
                // 验签通过
                System.out.println("交易名称: " + params.get("subject"));
                System.out.println("交易状态: " + params.get("trade_status"));
                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                System.out.println("商户订单号: " + params.get("out_trade_no"));
                System.out.println("交易金额: " + params.get("total_amount"));
                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                System.out.println("买家付款时间: " + params.get("gmt_payment"));
                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));
                // 更新订单未已支付
                Recharge recharge = rechargeService.getBypayid(tradeNo);
                rechargeService.updatestatus(recharge.getRecordid());
                Double balanceafter = recharge.getBalanceafter();
                userService.Updatebalance(balanceafter, recharge.getUserid());
            }
        }
        return "success";
    }
}



